An oil businessman from Texas has been sentenced to life in prison for killing his girlfriend’s ex-husband in a tangled case involving two love triangles and a child out of wedlock.

Johnny Lloyd Patton Jr, 68, of Fort Worth, was convicted Thursday of murder in the October 2013 shooting death of Richard Slatkin.

Patton admitted to gunning down Slatkin, 66, but claimed during his trial that the victim had repeatedly threatened to kill him.

Guilty verdict: Johnny Lloyd Patton Jr (left), 68, of Fort Worth, was convicted Thursday of murder and sentenced to life in prison in the 2013 shooting death of 66-year-old Richard Slatkin (right)

Messy love triangle: Slatkin had been married to Catherine Slatkin (pictured), who had an extramarital affair with Patton's son and had a baby with him before starting a relationship with the 68-year-old oilman

Police in Benbrook got a 911 call from Patton at around 3pm on October 1, 2013, about a disturbance outside his girlfriend's home, reported Fort Worth Star-Telegram.

The emergency dispatcher who handled the call heard Patton say, 'he's going to shoot me,' according to a search warrant.

When officers arrived on the scene, they discovered Richard Slatkin lying dead on the ground from a bullet wound to the chest. Patton was unharmed.

'I had to pull the trigger,' an officer overheard Patton say.

According to the affidavit, Slatkin, who worked as a private investigator, went to the home of his ex-wife, Catherine, to pick up a washer and dryer.

Police said Slatkin and two other people were loading the appliances onto a truck when Patton pulled up and shot his romantic rival, who was unarmed.

Officers who responded to the scene found two guns belonging to Patton.

The 68-year-old man was indicted on a murder charge in December 2013 and later released on a reduced $25,000 bail.